Not So Tough

20

Kill 10 'Ard Boyz.

'Ard Boyz are the Orks that you see starting during Chapter 6/7 that carry the red riot shields. The Vengeance Launcher take 3 shots to kill an 'Ard Boy, and grenades can bypass their shields as well. Wailing on them in melee is liable to get you killed, as their shields will absorb most of the damage.

This didn't actually pop for me during my playthrough of the game... fortunately I remembered where they first appear (Part 2 The Inquisitor-> 6 Lair of Giants -> With Drogan, the room after you see the warboss) and 3 of them attack you. I got it then, phew.